First a note: I am writing from memory. If any legal brains think I am talking kak, please correct me.
I really do not want to open a can of worms

Please keep in mind my comments in my original response about the kind of penalties that have been awarded based on the OHSAct. I believe this is simply a heads up to be prepared and prevent an uncomfortable situation that may or may never arise.
Comments on the recent posts:
Nothing can indemnify against negligence. If the responsible person was negligent an indemnity is not worth the paper it is written on. In the worst case the indemnity can be used as ammunition to ensure that the OHSAct is applied to the case.
No need to sign over to the landowner. The landowner takes primary responsibility anyway. There is no way out (except rewriting the law). He/she can share the responsibility by delegating but cannot dodge it. This applies to all on his property from his farmworkers through to his sons mate who rides his bicycle on the farm.
Keep in mind that no company CEO is going to put on an overall to go and inspect lifting equipment on his site. He appoints a competent person for the job. The CEO's job through lines of delegation is then to ensure that the work gets carried out, and by a competent person.To apply this to our scenario: A wake up landowner will keep a record of routes bolted and a register of (annual?) inspection of anchors. He will try to get commitment from the bolter, MCSA or someone for this task or if he is involved in making profit from climbing he should really consider appointing a competent person (engineer-ish type) to declare anchors safe.
In my opinion the onus is not on bolter to maintain the anchors on the route he set up, same as the builder of an amusement park is not forced by law to maintain it. Maintenance is the responsibility of the owner of the amusement park. Hope this answers your question 9ja.
I guess the only way here to try and dodge the OHSAct would be for a landowner to allow people to climb for free, and putting up a sign saying that he neither prohibits or allows climbing, that he has no knowledge of climbing and that all climbers should assess the risk of climbing in general, and a specific route themselves; but I am not sure if it will work. I do know that the OSHAct is 101% applicable the moment money changes hands.
JohnNam, I am not trying to imply that landowners 'take over' route maintenance, only that it would be prudent for them to become involved and ensure that it is done (at least to some degree). In a hypothetical court case I guess the magistrate/judge will ask the landowner:
i. could you have foreseen that an accident could happen?
ii. What did you do about it?
If the landlord is a non-climber with no experience in OHSAct, PPE, working at height or lifting equipment but at least have on record an invitation to the local climbing club to regularly inspect the anchors, and ideally some record of inspections he would probably be protected, because he tried to be proactive.
Next in line would be the inspector:
i. Are you competent (if only a volunteer, or if not competent, the ball may bounce back to the landowner)
ii. Explain what makes you competent (ie 10 year bolting and climbing experience, experienced rigger, mechanical engineer, etc - court to decide if competency is valid)
iii. Based on last inspection of the failed anchor in question: have you noted any suspect conditions on the anchor (evidence in the inspection register.
if yes: did you report it to the landowner? (if yes, ball back to landowner who should have prevented use of the route i.t.o. section 37 of the OHSAct)
if no, but there is proof that an inspected anchor was unsafe then our inspector is in the hot seat due to negligence.
PLEASE guys, We all know that as climbers we take responsibility for our own safety. Those tiny leaflets that comes with draws, carabiners, friction devices etc from petzl, db, etc (that we dont read) constantly remind us of this.
Have peace of mind that according to Du Pont Safety more than 90% (98%??) of incidents are caused by human error. (hope I remembered this correctly)
If an experienced climber knows that a route is unsafe or has dodgy anchors and still climbs it he must suffer the consequences. Personally I would assume a measure of risk on bolt integrity on any bolted route. That is why I use as many draws as there are bolts. When setting up a toprope, I have a good look at the anchor before sailing down an letting other loose on the route. If someone sues you can be sure that the defence attorney will hammer on these items and if an injured climber has a reputation of taking unnecessary risk his case will probably fall apart.
For interest sake, the act may also apply at home, but it does not stop us from throwing parties at which some of us may do very stupid things

There is no cure for stupidity!
9ja, I will work on a crag bolting risk assesment form and create a new post it on the forum some time in the future for comment.